Perception of Truth to Trust

It's strange isn't it, how trust, honesty, and truth are all linked together.
I mean, we only trust someone who we believe is being honest, but they are only being honest about their perception of truth and that sometime opppss sorry it is all the time really disturb me
So how can I trust someone who's truth may be different to my own?
Or how can I believe they aren't just lying?
Which leads ... onto lies, and what people believe or what their knowledge of lies are.
If they believe they are telling the truth, how do I know that what I'm thinking aren't the lies?
Then that brings me back round to trust, but self trust, the kind I have to have to accomplish things I know I'm are capable of.But still this doesn't conclude honesty, trust and the truth because......

I guess it's all depends on how I interpret what I have just written.

and I guess I only can only trust my sweetheart and myself